Window-sash fastener



S. R. PARKES.

WINDOW SASH FASTENE&

APPLICATION man Nov.21.1915.

1,338,250. Patenwd Apr. 27, 1920.

Fla. 41. a, Flc.. 2. a',

'lill 'l l lATTY.

STATESl PATENT OFFICE.

SAMUEL ROWLAND rARKEs, or wiLLENHALL, ENGLAND.

WINDOW-SASH FASTENER.

assassino.

Application filed November 27, 1915.

To all wle/0m, t may concern.'

Be it known that l, SAMUEL RowLAND Promiss, subject of the King of Great Britain, residing at Pretoria Works, lVillenhall, in the county of Stafford, England, have invented new and useful Improvements in lWindow-Sash Fasteners, of which the following is a specication.

This invention has reference to fasteners for window sashes of the kind commonly known in the trade as Fitch fasteners. rlhe object of the invention' is to simplify the construction of the part which, by the aid of springs, holds the locking lever or operative portion of the fastener in its latched and unlatched position, and at the same time reduce the cost of manufacture.

llhe invention is illustrated on the accompanying drawing in which:

Figure l is a plan view of the window sash fastener in its locked or fastened position.

Fig. 2 is a similar view showing the fastener unlocked or unfastened.

Fig. 3 is an inverted plan view of Fig. 1.

Fig. 4L is a view showing a strip of metal, before and after being bent, which forms the projections on the underside of the locking lever or operative part of the fastener.

Fig. 5 is a plan view of the lever showing the radially formed slots through which the projections pass.

Fig. 6 is a transverse sectional view of the sash fastener with the lever swung around to show the lugs of the strip of metal.

The main parts of the sash fastener are made as is usual from sheet metal by suitable press tools. A is the part to be secured to the upper window sash, having the raised portion c. B is the lever or operative part of the fastener, pivotedly connected to its base D. The radially curved edge b of this lever, when in its fastened or locked posi-- tion, fits under the raised portion a of the part A, the projection a2, on the underside of the raised portion a, bearing against the inner surface of the edge Zi and thus drawing the two sashes tightly together. Springs S are located in the hollow portion onthe underside of the base D for holding the lever B in its operative and inoperative positions.

Now to hold this lever B in its operative and inoperative positions the springs S must bear against projections correlatively oper- Specication of Letters Patent. Y Patented Apr, 27, 1920.

Serial No. 63,709.

ative with the said lever, and in order to accomplish this I provide two radially formed slots b2 in the bearing surface of the lever, as clearly shown by Fig. 5. I then shape and form a strip of metal E, as shown by Fig. a', so that the downwardly bent ends c', when inserted in the slots b?, project therethrough for. the springs S to bear against, as clearly shown by Fig. 3. The center portion of the strip E, when the ends c are inserted in the slots b2, may lie flush with the outer surface of the lever by forming a corresponding recess in the surface of such lever. All the parts are held together by a headed pin passing through a hole in the center portion of the strip E and through a hole in the level' B, a washer S being Xed on the end of said pin. This pin acts as the axis on which the lever B pivots.

The base D is provided with a central circular opening D into which the depressed portion B of the lever B extends and which opening forms a bearing for the depressed portion of the lever in the pivotal action of the latter. The strip E has its central portion arranged in the depression of the lever while the side portions or lugs c ofthe strip E pass through the arcuate slots b2 of the lever B. The strip E and the lever B are secured to the base by a rivet F piercing the strip E, the lever B and the washer S. The pin F is provided at its upper end with a head F" arranged as clearly shown in Figs. l and 2. The washer S which lits against the lower edges of the springs, is of circular form and extends entirely across the space between the side portions of the marginal flange D2 of the base D. The lever B is arranged flat upon the upper face of the base D and the lugs or lside portions e of the strip E are engaged by the springs and are rigidly interlocked with the lever by being passed through the slots b2 thereof.

It will be obvious the slots b2 in the bearing surface of the lever may be straight instead of curved, but by forming these slots radially the springs act only as a check on the movement of the lever when in its operative and inoperative positions.

What I claim as my invention, and desire to secure by Letters Patent is A sash fastener, including a base having a circular opening, a lever arranged upon the base and provided at the said opening with opposite slots, a strip arranged upon the upper .tace of the lever and extending across the space between the said slots yand provided with spaced lugs extending through the said slots and projecting downwardly from the lever into the base, springs 10 springs, and a pivot piercing the strip, the

lever and the washer and securing the said parts to the base. y

In testimony whereof I have signed my name to this speciication in the presence of two subscribing witnesses.4

Witnesses:

F. C. MOUNTNEY, B. A. READ. 

